pdf英文全称为portable document format,翻译成中文即可移植文档格式
adobe_pdf_hero_1200_675
document format的简称,意为"便携式文档格式"),是由adobe systems
document format的简称,意为"可携带文档格式"),是由adobe systems
adobe官方推迟发布pdf阅读器补丁计划
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